Spot-facing machine



C. G. WOOD AND J. M. WILSON.

SPOT FACING MACHINE.

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1,318,039. Patented Oct. 7,1919.

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CLARENCE G. WOOD AND JOHN M. WILSON, OF MUN CIE, INDIANA.

SPOT-FACING MACHINE.

Specification of Letters Patent.

Patented Oct. '7, 1919.

Application filed August 26, 1915. Serial No. 251,362.

To all whom it may concern:

Be it known that we, CLARENCE G. W001) and JOHN M. WILSON, citizens of the United States, residing at Muncie, in the county of Delaware and State of Indiana, have invented certain new and useful Im rovements in Spot-Facing Machines, of which the following is a specification.

This invention relates to improvements in millin or finishing machines.

In t e work of constructing and completing machine parts in readiness to be assembled it is a well established practice to dress or true-up the surface of the metal at all holes where binding bolts are to be used; the purpose bein to afford an accurate seating for the heads of the bolts, or for the nuts that may be screwed down on such bolts.

On account of the vast amount of machine production demanded by present-day needs it is obvious that means to facilitate this work of machining or spot-facing would be of immense advantage. Besides cheapening the cost of machine construction there would be the greatly increased speed of production of finished machinery.

The object of the present invention is to provide a machine b which spot-facing may be done accurate y, rapidly and economically. More specific purposes of the mvention are to IOVldB a machine of the kind described whic will be rugged and durable, not liable to t out of repair and which will be economica of manufacture.

The purposes of the invention are accomplished by and the invention is embodied in the new construction, combination and arrangement of parts shown in the accompanying drawings. The invention is described in the fol owin specification and is defined in the a pende claims.

In the several views of our improved spotfacin machine, as shown in the drawings, the dlflerent parts of the machine are in dentified by suitable characters of reference- Figure 1. is a vertical central sectional view of our spot-facing machine, some of the arts being shown in elevation.

Fig. 2. is a top plan view of a part ofthe head member, a portion of a flanged work piece being shown by the dotted lines. 7

Fig. 3. 1s a top plan view taken on the line 3-3 in Fig. 1.

The substantial work-table plate 1, upon" which the object to be spot-faced is disposed, may form a part of the usual frame construction comprising members 2 and 3.

The frame block 4 of the machine and which is secured to the underside of plate 1 bear against the underside of the head member and its other end to bear against the plate 1, sustains the head member 8 normally at the raised position shown. The function of the spaced longitudinal grooves 7 in the spindle 7 will be presently referred to. Means to retain the spindle 7 against rotative movement, but which permits the movement of the spindle vertically, consists of a headed detent 10 slidingly retained in a guide block 11 that is secured in the recess 12 of a lug formed on the side of the boss 6. The inner end of this detent rests slidingly in a hole that extends from the recess 12. The annular lip 10 has such position on the detent that when the lip is at bearing on the seat of the recess, the nose of the detent is in engagement with the groove 7. The detent is maintained normally at this engaged position by a spiral spring 13 arranged between the lip of the detent and the inner side of the guide block 11. The outer end of the detent 10 has a handle l0 by which the operative may pull the detent to retracted position to permit the head member 8 to be shifted.

At-the lower portion of the spindle 7 is provided an inset loose divided sleeve 15 upon which is trunnioned an o crating lever 17. The fulcrum end of this ever is journaled on a suitable pin 18 carried by a lu 4 that forms a part of the frame block 4. y depressing the lever 17 the head member 8 is accordingly lowered such distance as is fixed by the height at which the set screw 20 malty be adjusted.

ear the peripheral edge of the head plate 8 is loosely supported a member upon which is carried a rigidly secured cutting tool this said member which we desi ate herein as a pilot shank 21 is so forme that when carried by the head member 8 to lowered position, it enters and occupies a position of direct co-engagement with a shank block that forms a part of a driving shank 22.

The preferred form of construction of this driving shank is that shown in the drawing. The upper portion of the central bore 23' is angular in eroee section and constitutes a I recess in which an angular shank block or shell 24 is retained. This shank hlbbk'Qt which has a longitudinal recess of size and contour to receive the=pilot shank, isada pted to be inserted through thelower and eirgrzulai' portion 23 of the driving shank. It'is snpported at position shown by a divided cxt pension cire-let 25 that is inserted through the bore 23 and sprung ,to position in the annular seat. 26.

The driving shanki22 which has thelanuular shoulder 22* is journaled in a suitable bearin" 27 provided in the boss 28. Secured on the lower and shouldered end of the driv: ing shank by a retaining nut 29, is a bevel gear wheel 30.

()n the driving shaft 31 which is journaled at proper poeition as shown, is a gear wheel 32 that meshes with the gear wheel 30.

The circular milling tool 33 is internally threaded and is screwed down on the tlu'ead ed portion of the pilot shank 21. Between the top of this pilot shank and theunder side of thehead member 8 is disposed a bearin ring fil. Through the: top portion not-,- the stem 21* of the pilot shank is a cotter-pin 35 b)" which the shank is so ported. i.

Advantages afforded by tl isinvenliion are that the workof'spot-facin inay be performed accurately and rapid y and at sur faces otherwise difiicult of accessgr suoh'as locations on flanged cylindershand other flanged motor and machine partsu It is obvious that by. haring the cuttin tool above the article to be spotmfeeed' an capable of being lowered to cuttingi engage ment, and with its shankito-makes connection with the actuating or driving parts of the machine, there isat once provided a ma-. chine. by which the work ofspQt-iaeingirna be performed with, aecuraey,'ease, and Moreover a machine forithei p .eposende. scribed, and constructed v:in. .aecp-r since with this invention, |wil1 operate with a minimum of frietionvor strain The; machine in readiness to.,be ,=o ere'tedr appears as, shown in ,the. drawings, tliehead raised position, there Joei at -,all L .times; .a clearance underneath the .p' (at shank 21.81135 ficient to permit the passing ,into; positionioi the machine plate, flanged cyl'ndenpr other. obieetiart t at is to. be 5 0t. aeed. t W1 1 be understood t ,atiliihefsetting 5 up ofthemachine, a pilot shank 21 of-di-fl meter to freely pass: through fthe. hole in!- the objeehpart is used. E

The object-part 'being passedito ositionfl; the operator de resses the lever 1 The length of the pilot shank isisuoh thatite end portion having passed through thehole' in the object-part, enters the angular recess:

' part.

jo nr 8 being. sustained by. the spring 9 at of the shank hlot'k 2 lhefore the face ot the ring tool n'ieets the surface ofthe objectpart-r As the le'ver is t-IepreSSed-and the head 8 islowered, the ring tool 33 con'ies to engagement with the surface of the object Continued pressure by the operative at the-det'en '17 causes the tool toqui'ekly face otl' thennetal surface of the object-part. The operative by then lifting the lever raises the tool and pilot shank clear ofthe object.- pann The object-part 'lSwthBH shifted to bring another of lts holes .to registration with itheipilot, shank. The operation just described is then repeated.

By thearnangenient 0ft a plurality of the openings; 36;.in the head, membenS it is practicable to have auxiliary or extra pilot shanks-fitted with cutting tools of different widths and shapes; thus providing means for a wide range-offinishing requirt-anents.

To more the desired pilot shank to open ative position, theioperatoa' of the machine retracts the'detent 10 and swings'thehead member .8 rotatively, the detent snapping into groove 7* when the-pilot shank comes to re iptration with the dri vi ng ;sh a 111 %he maehinerdescribed and illustrated is deemed the preferred form of embodiment. of :ounpresent inventiom We areaware that; iminor ehanges may 5 be made in the form,- construction .and arrangement of the several, parts :within' the. range ,of the inventionaadefined by the elaims withont de-iartin-g fmmnits. spirit or sacrificing any of its, advantagee.

What we clainuas ouninvention and desire to seeure by; Letters Patent is.

1. Theicombmationof a frame, a headinemben imorablemtowamdwand away from the i frame,-.a vdriving shankj ournalediin the frame, ,a pilotshank journaled inthe head member. and adapted to interlock .with the drivingishankavhen the aheadmemben 13 pp: erated, a cutting: tool Gil-Driedby v h pllflt shanlgi nd means .to operate, the head menr her.

hemnhi-eatim t f frame a i riring. shank journaled, in thenframe, a headmem; ben csu outed by, ;tl1e:-frame, .a pgot shank}: f

l im theh a emhs n a apt 115 to interlock with theidriying ehanlg Nvhenthe. head memberris opereted a sprmg between thel-headumemben and, .the frame to susta1n., the. ,f xmenat raised position, a eutt1ng,tool J 7 carried y" the.ipil0t:= mik,i and m ans; to 1 20 lower the head member.

3., A limaeh inevof the descnbed, cont-- prising a ifrarne aheadhn ember having ts; i stem ournaled.. shdmgl y m frame, at

driying, shank jonrnaledanthesaid frame ae pilot an]; .fjo urneled inlithe ilieadi member, and adapted: to. 1 interlock with. the. driving: i shank when; lowered! into I (loengagement the-,pilot shanlgua spring. tofmaiatain the head member normally at raised position, a means to lower said head member, a power Shaft and gearin between the power shaft and the driving s ank.

4. A machine of the kind described, comrising a frame, a drivin shank journaled 1n the frame, a head meni ber supported by the frame, a pilot shank journaled in the head member and adapted to interlock with the drivin shank when the head member is operate means to sustain the head member yieldably at raised position, a cutting tool carried b the iiot shank, means to lower the hea mem er, and an adjustin v device to vary the distance to which the head member may be lowered.

5. A machine of the kind described, comsaid stem the head member is secured, there being spaced longitudinal grooves in the said stem, a pluralit of openings in the peripheral portion of the head member, a pilot shank journaled in one of said 0 enings and adapted to interlock with the riving shank when shifted into co-engagement with the driving shank, a cutting tool carried by the pilot shank, a spring to maintain the head member normally at raised position, a means to lower the said head'memher, a detent to engage one of the ooves of the head-member stem to retain t e stem against rotative movement, a power shaft, and power transmitting connections between the power shaft and the said driving shank.

In testimony whereof we aflix our signatures.

CLARENCE G. WOOD. JOHN M. WILSON.

Copies of thin patent may be obtained for five cents each, by addressing the "Bommiuioner of Patents, Washingtemi). 0." 

